Direct observation of a propagating spin wave induced by spin-transfer torque

M. Madami; S. Bonetti; G Consolo; S. Tacchi; G Carlotti; G Gubbiotti; F.B. Mancoff; Mazher Ahmed Yar; J. Akerman

Direct observation of a propagating spin wave induced by spin-transfer torque

M. Madami, S. Bonetti, G Consolo, S. Tacchi, G Carlotti, G Gubbiotti, F.B. Mancoff, Mazher Ahmed Yar, J. Akerman

Research output: Contribution to journal › Article › peer-review

Abstract

Spin torque oscillators with nanoscale electrical contacts are able to produce coherent spin waves in extended magnetic films, and offer an attractive combination of electrical and magnetic field control, broadband operation, fast spin-wave frequency modulation, and the possibility of synchronizing multiple spin-wave injection sites. However, many potential applications rely on propagating (as opposed to localized) spin waves, and direct evidence for propagation has been lacking. Here, we directly observe a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect. The data, obtained by wave-vector-resolved micro-focused Brillouin light scattering, show that spin waves with tunable frequencies can propagate for several micrometres. Micromagnetic simulations provide the theoretical support to quantitatively reproduce the results.

Original language	English
Pages (from-to)	635-638
Number of pages	4
Journal	Nature Nanotechnology
Volume	6
Issue number	10
Publication status	Published - 30 Oct 2011

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http://dx.doi.org/10.1038/NNANO.2011.140

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title = "Direct observation of a propagating spin wave induced by spin-transfer torque",

abstract = "Spin torque oscillators with nanoscale electrical contacts are able to produce coherent spin waves in extended magnetic films, and offer an attractive combination of electrical and magnetic field control, broadband operation, fast spin-wave frequency modulation, and the possibility of synchronizing multiple spin-wave injection sites. However, many potential applications rely on propagating (as opposed to localized) spin waves, and direct evidence for propagation has been lacking. Here, we directly observe a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect. The data, obtained by wave-vector-resolved micro-focused Brillouin light scattering, show that spin waves with tunable frequencies can propagate for several micrometres. Micromagnetic simulations provide the theoretical support to quantitatively reproduce the results.",

author = "M. Madami and S. Bonetti and G Consolo and S. Tacchi and G Carlotti and G Gubbiotti and F.B. Mancoff and Yar, {Mazher Ahmed} and J. Akerman",

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T1 - Direct observation of a propagating spin wave induced by spin-transfer torque

AU - Madami, M.

AU - Bonetti, S.

AU - Consolo, G

AU - Tacchi, S.

AU - Carlotti, G

AU - Gubbiotti, G

AU - Mancoff, F.B.

AU - Yar, Mazher Ahmed

AU - Akerman, J.

PY - 2011/10/30

Y1 - 2011/10/30

N2 - Spin torque oscillators with nanoscale electrical contacts are able to produce coherent spin waves in extended magnetic films, and offer an attractive combination of electrical and magnetic field control, broadband operation, fast spin-wave frequency modulation, and the possibility of synchronizing multiple spin-wave injection sites. However, many potential applications rely on propagating (as opposed to localized) spin waves, and direct evidence for propagation has been lacking. Here, we directly observe a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect. The data, obtained by wave-vector-resolved micro-focused Brillouin light scattering, show that spin waves with tunable frequencies can propagate for several micrometres. Micromagnetic simulations provide the theoretical support to quantitatively reproduce the results.

AB - Spin torque oscillators with nanoscale electrical contacts are able to produce coherent spin waves in extended magnetic films, and offer an attractive combination of electrical and magnetic field control, broadband operation, fast spin-wave frequency modulation, and the possibility of synchronizing multiple spin-wave injection sites. However, many potential applications rely on propagating (as opposed to localized) spin waves, and direct evidence for propagation has been lacking. Here, we directly observe a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect. The data, obtained by wave-vector-resolved micro-focused Brillouin light scattering, show that spin waves with tunable frequencies can propagate for several micrometres. Micromagnetic simulations provide the theoretical support to quantitatively reproduce the results.

M3 - Article

SN - 1748-3387

VL - 6

SP - 635

EP - 638

JO - Nature Nanotechnology

JF - Nature Nanotechnology

IS - 10

ER -

Direct observation of a propagating spin wave induced by spin-transfer torque

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